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Sum up values in a single MySQL column in a specific way?
Use aggregate function SUM() along with OVER. Let us first create a table −
mysql> create table DemoTable ( CustomerId int NOT NULL AUTO_INCREMENT PRIMARY KEY, CustomerValue int ); Query OK, 0 rows affected (0.64 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable(CustomerValue) values(10); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable(CustomerValue) values(20); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable(CustomerValue) values(30); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable(CustomerValue) values(40); Query OK, 1 row affected (0.14 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+------------+---------------+ | CustomerId | CustomerValue | +------------+---------------+ | 1 | 10 | | 2 | 20 | | 3 | 30 | | 4 | 40 | +------------+---------------+ 4 rows in set (0.00 sec)
Following is the query to sum up values in a single column in a specific way −
mysql> select CustomerId, SUM(CustomerValue) OVER (ORDER BY CustomerId) SpecificSum from DemoTable;
This will produce the following output −
+------------+-------------+ | CustomerId | SpecificSum | +------------+-------------+ | 1 | 10 | | 2 | 30 | | 3 | 60 | | 4 | 100 | +------------+-------------+ 4 rows in set (0.00 sec)
Updated on: 30-Jul-2019
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